Finding the Fourth Proportional to 134.72, 185.54 and 111.50

Step by Step Solution

1. Step 1: Write the proportion equation
   134.72 : 185.54 = 111.50 : x
2. Step 2: Convert to fraction form
   134.72/185.54 = 111.50/x
3. Step 3: Cross multiply
   134.72x = 185.54 × 111.50
4. Step 4: Simplify right side
   134.72x = 20,687.71
5. Step 5: Solve for x
   x = 20,687.71/134.72
6. Step 6: Final answer
   x = 153.56